Apparatus for roasting coffee.



No. 698,246. Patented Apr. 22,1902.

E. BENNETT.' APPARATUSTOH BOASTING QOFFEE.

(Application led. July 22 1901.) (No Model.) 3 Sheets-$heet ma N. E NN Patentedv Apr. 22, |902.

E. BENNETT. APPARATUS FOB RUASTING COFFEE.

(Application le'd July 22, 1901.)

\ 3 Sheets-Sheet 2.

(No Model.)

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PETERS no.. PMUYQLITHQ.. WASHINGTON. n. c.

I N0. 698,246. l g Patented Apr. 22,1902.

E. BENNETT.

APPARATUS FOR RDASTING COFFEE.

(Applicalion led July 22, 1901.) l (No Model.) 3 Sheets-Sheet 3.

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UNITED STATES `v`ATENT OFFIC.

APPARATUS FOR ROASTING COFFEE.

'sPEcIFIcATIoN forming para of Leners Patent No. 698,246, dated April 22, 1902.

Application filed July 22, 1901.

To @ZZ whom it may concern.'

Be it known that I EDWIN BENNETT, a subject of the King of England, residing at London, England, haveinvented certain Ifew and useful Improvements in or Relatingto Apparatus for Roasting, Drying, and Similar Purposes, (for which application has been made in Great Britainunder No. 9,271, dated May 4:, 1901,) of which the following is a specification.

This invention relates to apparatus for roasting, drying, and similar purposes, and refers more particularly to apparatus. for roasting coffee. With apparatus of this class as hitherto constructed the heat for performing the roasting has been applied externally from a gas or other furnace or burner, so that before reaching the material under treatment it has to heat up and penetrate the outer casing of the apparatus,whereby a considerable amount of heat is wasted.

It is the chief object of my invention to provide an apparatus in which the heat is applied to the material to be roasted from the interior.

According to myv invention I employ a revolving, oscillating, or other drum or cylinder provided with an inner perforated casing disposed between the material to be roasted and aheated bolt or core or a chamber heated by any appropriate means. The drum or cylinder may be rotated by hand or other power and is preferably provided with a sliding or other door, through which the material may be inserted into or withdrawn from the interior of the drum. This door may conveniently be formed of wire-gauze'or perforated metal, so as to enable the progress of the roasting to be readily Watched. When a bolt is used for supplying the necessary heat, I provide at one end of the revolving drum a hollow journal, through which the heated bolt can be inserted into the interior of the aforesaidperforated casing, said bolt being supported at the other end of the drum by an inwardly-extending projection. 'The bolt may heated in a separate furnace and is preferably providedwith a handle or other device by which it can readily be inserted into or withdrawn from the interior of the casing, or I may employ more than one bolt arranged at suitable intervals around the interior of the perforated casingA Serial Nox 69,216. (No model.)

The inner cylinder may consist of a sheet of wire gauze or netting or a sheet of perfo rated metal, according to the nature of the material yunder treatment. Around the interior of the drum or on the exterior of the inner casing I may provide one or more radial projections or armswhich act as baffles for stirring up the material or for holding part of it stationary for inspection purposes.

Instead of employing a bolt or core heated in a separate furnace previously to its being insertedinto the casing I may employ a bolt heated by electricity, -orI may employ other electrical heating means, I may also employ one or more chambers or compartments disposed Within the casing and.,l heat them directly by gas or other appropriate means.

` Referring to the drawings, Figure lis a side elevation. Fig. 2 is a transverse section on the line 2 2 of Fig. 1, andLFig. 3 is a longitudinal'section through an apparatus constructed in accordance with my invention.

A is the drum or cylinder,-B the inner perforated casing or screen,- and C the heating bolt or core.

The drum A is mounted on a stand orsupport D, which is provided with bearings D', one of which is adapted to receive a shaft or spindle A', projecting from the end/of the drum, and the other of which receives a hollow journal A2, formed in one with or con nected tothe other endl of the drum. The

heating-bolt O is inserted into the interior of the drum through the hollow journal A2. On its outer end the bolt is provided with a Iiange or collar O', which lits tightly into the hollow journal and is formed with 'a hole in its inner end, into which a projection A3 on the end of the drum enters to form a support for the bolt.

The perforated casing or screen B is formed of a piece of wire gauze ornetting and encircles the heating-bolt, being secured to flan ges `or collars A4 at each end of the drum..

The material to be roasted or dried is inserted into the drum throughthe door E, which slides in guides A5. The doorr is yprovided with transverse slots E', through which the contents of the drum maybe inspected.

Adjacent to the door E is a radial projection or arm B', connected to the inner casingv B, or it may be connected to the inner side of the wall of the drum. As the drum is rotated this arm stirs up the material within the drum IOO and carries some of it around with it, so that the progress of the heating or roasting may be noted by examining the portion of the material held stationary by the arm.

The bolt is preferably provided with a rod C3, on the outer end of which is mounted a wooden or other handle C4, by means of which the bolt may readily be withdrawn from the drum to be heated in a separate furnace and thereafter be again inserted into the drum.

The drum is rotated by hand by means of a crank and handle F, mounted on the end of the spindle A', or I may provide the rod C3 with a device operated by hand or other power for rotating the apparatus, or the drum may be rotated by any other convenient means.

Instead of imparting a rotary movement to the drum it may be given an oscillatory or other suitable motion.

What I claim as my invention, and desire to secure by Letters Patent, is-n 1. In an apparatus for roasting, drying and similar purposes the combination with a rotatable chamber of a heated bolt removably arranged within the chamber and aperfora ted casing encircling the bolt as and for the purpose specified.

2. In an apparatus for roasting, drying and similar' purposes the combination with a chamber of a removable heating-bolt disposed within the chamber, a perforated casing placed between the bolt and the material under treatment, a door in the chamber and means for rotating the apparatus.

3. In an apparatus for roasting, drying and similar. purposes, the combination with a chamber of a heated bolt disposed within the chamber, a perforated casing between the bolt and the material under treatment, a door in the chamber, a hollow extension on one end of the chamber for the reception of the bolt and an inwardly-extending projection on the other end of the chamber to support the bolt substantially as described.

4. In an apparatus for roasting, drying and similar purposes the combination with a chamber of a heated bolt disposed within the chamber, a perforated casing between the bolt and the material under treatment, a door in the chamber, a hollow journal on one end of the chamber for the reception of the bolt, an inwardly-extending projection on the other end of the chamber to support the bolt and a radial arm within the chamber substantially as and for the purpose described.

5. In an apparatus for roasting, drying and similar purposes the combination witha chanr ber of a heated bolt disposed therein, a perforated casing placed between the bolt and the material under treatment, a radial arm on the inner casing, a door in the outer casing and means for rotating the chamber.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWIN BENNE' Witnesses i HAROLD WADE, HARRY I3. BRIDGE. 

